????:1??????????:??????

2??????????

3???????????

4???????

5?????????

??6??????????????????20??????????????????????????????? (??????????????)???????????20??,?????????,??7?20???????8??????????,??????????????????????

??????????,????????????????31????,??70%????????????????,??60%,????????????????????74%?

?6??????????????,?????????,??72%;???????,??????????77%;???????????,????????????????????????48%,???????130???54.5???,??????????58%;??,??????????53%???????????????????????????????????76%?

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